9. You refuse spontaneous visits and tell him, “If you’re coming over, call me first”
“There’s definitely another guy involved! I want to go over there and find out what’s going on.” Some guys are confident that their girlfriends are cheating if they can’t go over to visit whenever they feel like it. If he won’t listen no matter what you say, you might have to convince him by doing something drastic, like giving him a key.